1 # SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
2 %YAML 1.2
3 ---
4 $id: http://devicetree.org/schemas/pinctrl/mediatek,mt8186-pinctrl.yaml#
5 $schema: http://devicetree.org/meta-schemas/core.yaml#
6
7 title: MediaTek MT8186 Pin Controller
8
9 maintainers:
10 - Sean Wang <sean.wang@mediatek.com>
11
12 description:
13 The MediaTek's MT8186 Pin controller is used to control SoC pins.
14
15 properties:
16 compatible:
17 const: mediatek,mt8186-pinctrl
18
19 gpio-controller: true
20
21 '#gpio-cells':
22 description:
23 Number of cells in GPIO specifier. Since the generic GPIO binding is used,
24 the amount of cells must be specified as 2. See the below mentioned gpio
25 binding representation for description of particular cells.
26 const: 2
27
28 gpio-ranges:
29 maxItems: 1
30
31 gpio-line-names: true
32
33 reg:
34 description:
35 Physical address base for GPIO base registers. There are 8 different GPIO
36 physical address base in mt8186.
37 maxItems: 8
38
39 reg-names:
40 description:
41 GPIO base register names.
42 items:
43 - const: iocfg0
44 - const: iocfg_lt
45 - const: iocfg_lm
46 - const: iocfg_lb
47 - const: iocfg_bl
48 - const: iocfg_rb
49 - const: iocfg_rt
50 - const: eint
51
52 interrupt-controller: true
53
54 '#interrupt-cells':
55 const: 2
56
57 interrupts:
58 description: The interrupt outputs to sysirq
59 maxItems: 1
60
61 mediatek,rsel-resistance-in-si-unit:
62 type: boolean
63 description:
64 Identifying i2c pins pull up/down type which is RSEL. It can support RSEL
65 define or si unit value(ohm) to set different resistance.
66
67 # PIN CONFIGURATION NODES
68 patternProperties:
69 '-pins$':
70 type: object
71 additionalProperties: false
72 patternProperties:
73 '^pins':
74 type: object
75 additionalProperties: false
76 description: |
77 A pinctrl node should contain at least one subnodes representing the
78 pinctrl groups available on the machine. Each subnode will list the
79 pins it needs, and how they should be configured, with regard to muxer
80 configuration, pullups, drive strength, input enable/disable and input
81 schmitt.
82 An example of using macro:
83 pincontroller {
84 /* GPIO0 set as multifunction GPIO0 */
85 gpio-pins {
86 pins {
87 pinmux = <PINMUX_GPIO0__FUNC_GPIO0>;
88 }
89 };
90 /* GPIO128 set as multifunction SDA0 */
91 i2c0-pins {
92 pins {
93 pinmux = <PINMUX_GPIO128__FUNC_SDA0>;
94 }
95 };
96 };
97 $ref: pinmux-node.yaml
98
99 properties:
100 pinmux:
101 description:
102 Integer array, represents gpio pin number and mux setting.
103 Supported pin number and mux varies for different SoCs, and are
104 defined as macros in dt-bindings/pinctrl/<soc>-pinfunc.h directly.
105
106 drive-strength:
107 enum: [2, 4, 6, 8, 10, 12, 14, 16]
108
109 drive-strength-microamp:
110 enum: [125, 250, 500, 1000]
111
112 bias-pull-down:
113 oneOf:
114 - type: boolean
115 - enum: [100, 101, 102, 103]
116 description: mt8186 pull down PUPD/R0/R1 type define value.
117 - enum: [200, 201, 202, 203]
118 description: mt8186 pull down RSEL type define value.
119 - enum: [75000, 5000]
120 description: mt8186 pull down RSEL type si unit value(ohm).
121 description: |
122 For pull down type is normal, it don't need add RSEL & R1R0 define
123 and resistance value.
124 For pull down type is PUPD/R0/R1 type, it can add R1R0 define to
125 set different resistance. It can support "MTK_PUPD_SET_R1R0_00" &
126 "MTK_PUPD_SET_R1R0_01" & "MTK_PUPD_SET_R1R0_10" &
127 "MTK_PUPD_SET_R1R0_11" define in mt8186.
128 For pull down type is RSEL, it can add RSEL define & resistance
129 value(ohm) to set different resistance by identifying property
130 "mediatek,rsel-resistance-in-si-unit".
131 It can support "MTK_PULL_SET_RSEL_000" & "MTK_PULL_SET_RSEL_001" &
132 "MTK_PULL_SET_RSEL_010" & "MTK_PULL_SET_RSEL_011" define in
133 mt8186. It can also support resistance value(ohm) "75000" & "5000"
134 in mt8186.
135 An example of using RSEL define:
136 pincontroller {
137 i2c0_pin {
138 pins {
139 pinmux = <PINMUX_GPIO128__FUNC_SDA0>;
140 bias-pull-down = <MTK_PULL_SET_RSEL_001>;
141 }
142 };
143 };
144 An example of using si unit resistance value(ohm):
145 &pio {
146 mediatek,rsel-resistance-in-si-unit;
147 }
148 pincontroller {
149 i2c0_pin {
150 pins {
151 pinmux = <PINMUX_GPIO128__FUNC_SDA0>;
152 bias-pull-down = <75000>;
153 }
154 };
155 };
156
157 bias-pull-up:
158 oneOf:
159 - type: boolean
160 - enum: [100, 101, 102, 103]
161 description: mt8186 pull up PUPD/R0/R1 type define value.
162 - enum: [200, 201, 202, 203]
163 description: mt8186 pull up RSEL type define value.
164 - enum: [1000, 5000, 10000, 75000]
165 description: mt8186 pull up RSEL type si unit value(ohm).
166 description: |
167 For pull up type is normal, it don't need add RSEL & R1R0 define
168 and resistance value.
169 For pull up type is PUPD/R0/R1 type, it can add R1R0 define to
170 set different resistance. It can support "MTK_PUPD_SET_R1R0_00" &
171 "MTK_PUPD_SET_R1R0_01" & "MTK_PUPD_SET_R1R0_10" &
172 "MTK_PUPD_SET_R1R0_11" define in mt8186.
173 For pull up type is RSEL, it can add RSEL define & resistance
174 value(ohm) to set different resistance by identifying property
175 "mediatek,rsel-resistance-in-si-unit".
176 It can support "MTK_PULL_SET_RSEL_000" & "MTK_PULL_SET_RSEL_001" &
177 "MTK_PULL_SET_RSEL_010" & "MTK_PULL_SET_RSEL_011" define in
178 mt8186. It can also support resistance value(ohm) "1000" & "5000"
179 & "10000" & "75000" in mt8186.
180 An example of using si unit resistance value(ohm):
181 &pio {
182 mediatek,rsel-resistance-in-si-unit;
183 }
184 pincontroller {
185 i2c0-pins {
186 pins {
187 pinmux = <PINMUX_GPIO128__FUNC_SDA0>;
188 bias-pull-up = <1000>;
189 }
190 };
191 };
192
193 bias-disable: true
194
195 output-high: true
196
197 output-low: true
198
199 input-enable: true
200
201 input-disable: true
202
203 input-schmitt-enable: true
204
205 input-schmitt-disable: true
206
207 required:
208 - pinmux
209
210 required:
211 - compatible
212 - reg
213 - interrupts
214 - interrupt-controller
215 - '#interrupt-cells'
216 - gpio-controller
217 - '#gpio-cells'
218 - gpio-ranges
219
220 additionalProperties: false
221
222 examples:
223 - |
224 #include <dt-bindings/pinctrl/mt8186-pinfunc.h>
225 #include <dt-bindings/interrupt-controller/arm-gic.h>
226
227 pio: pinctrl@10005000 {
228 compatible = "mediatek,mt8186-pinctrl";
229 reg = <0x10005000 0x1000>,
230 <0x10002000 0x0200>,
231 <0x10002200 0x0200>,
232 <0x10002400 0x0200>,
233 <0x10002600 0x0200>,
234 <0x10002A00 0x0200>,
235 <0x10002c00 0x0200>,
236 <0x1000b000 0x1000>;
237 reg-names = "iocfg0", "iocfg_lt", "iocfg_lm",
238 "iocfg_lb", "iocfg_bl", "iocfg_rb",
239 "iocfg_rt", "eint";
240 gpio-controller;
241 #gpio-cells = <2>;
242 gpio-ranges = <&pio 0 0 185>;
243 interrupt-controller;
244 interrupts = <GIC_SPI 186 IRQ_TYPE_LEVEL_HIGH 0>;
245 #interrupt-cells = <2>;
246
247 pio-pins {
248 pins {
249 pinmux = <PINMUX_GPIO0__FUNC_GPIO0>;
250 output-low;
251 };
252 };
253
254 spi0-pins {
255 pins-spi {
256 pinmux = <PINMUX_GPIO0__FUNC_SPI0_CLK_B>,
257 <PINMUX_GPIO1__FUNC_SPI0_CSB_B>,
258 <PINMUX_GPIO2__FUNC_SPI0_MO_B>;
259 bias-disable;
260 };
261 pins-spi-mi {
262 pinmux = <PINMUX_GPIO3__FUNC_SPI0_MI_B>;
263 bias-pull-down;
264 };
265 };
266
267 i2c0-pins {
268 pins {
269 pinmux = <PINMUX_GPIO127__FUNC_SCL0>,
270 <PINMUX_GPIO128__FUNC_SDA0>;
271 bias-pull-up = <MTK_PULL_SET_RSEL_001>;
272 drive-strength-microamp = <1000>;
273 };
274 };
275 };
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